Say you're starting late into boxing, you're in your twenties, fast and have a killer punch, which path do you think is likely to lead you to the most success, being a 6"3 young athletic HW among today's crop or being 6"3 in today's batch of middleweights (including SMW).

So you'll be small but fit in a division that is currently lacking stellar talent, or a giant in a division packed full of talent.

A huge middleweight obviously. Being a small heavyweight would be that much harder. And unless your coaches school you on the importance of body punching, (a lost art up there). You're only going so far.